About the book: 2022 / Once upon a time there lived Koschey the Immortal and Baba Yaga. They were fond of playing riddles. Yes, not just like that, but based on desires. The loser had to fulfill the whim of the other. One day Koschey won and came up with a difficult task for Baba Yaga. Yaga dealt with it, but did not expect that as a result she would have to treat a cold boy.